You’re mixing two concepts. Rama was talking about NavModifierVolume and it’s not the same as NavModifierComponent. In general NavModifierComponent should always automatically move with it’s owner.
Having said that - I’ve just checked and it’s bronek The NavModifierComponent doesn’t update its location (well, it doesn’t have a location per se, but from the user point of view). I’ve filed it as a bug, but won’t get fixed before 4.8. Sorry!
I love how even the bugreport filed for this Unreal Engine Issues and Bug Tracker (UE-11716) is listed as Fixed while it seems still very bugged to me… I have my components set up to affect navigation and dynamic runtime navmesh generation yet no cookie.
Am I doing something wrong I wonder…?